Dr Wojciech A. Hellwing
Position: ERC Research FellowE-mail: hellwing(at port.ac.uk)Telephone: +44 (0)2392 845150Office: DS3.08
Research interests: large-scale structure, modified gravity, cosmic flows, galaxy evolution
Publications from UKADS
Publications from INSPIRE
Publications from arXiv
Publications from the UoP Research Portal
External talks (academic)
- Galaxy formation in Warm Dark Matter cosmologies. on 11th Sep 2017 5:00:pm While the Earth-base laboratories keep trying very hard to elucidate on the nature of the elusive dark matter particles the other very promising avenue to test and/or falsify potential dark matter candidates resides in astrophysical observations. In this context our own Galaxy – the Milky Way – with its unique set of satellites shows potential...
- “Cosmic flows, Copernicus principle and the gravity” @Alpine Cosmology 2017 workshop on 24th Jul 2017 6:00:pm I will show and discuss how the location of the Local Group with respect to the local Cosmic Web influence the properties of galaxy velocity correlation statistics. We will demonstrate how and up to what scales various properties of the LG-like environment correlate with the nearby galaxy velocity field. The effects we show have profound...
- Non-standard cosmological tests of gravity on 19th Apr 2017 10:30:am In this talk I will present a short introduction to modified gravity models commonly discussed in the modern literature. Next, I shall focus on the recent results that I and my collaborators have obtained, concerning some novel observational probes of GR and some modified gravity models on cosmological scales. The new probes are based on...
- Tracking Dark Matter and Dark Energy with supercomputers. on 14th Apr 2017 3:30:pm In this overview talk I shall present the current state-of-the-art usage of computer simulations in modelling of observational signals in searches for tracers of Dark Matter in the Local Group and Dark Energy in the large-scale structure of the Universe. A practical example will be given with the simulations employed in projects that are being...
- Cosmological test of gravity on 15th Nov 2016 4:00:pm I will briefly discuss the current status of standard model of cosmology with the emphasis on the GR as its main building block. Then will stress out why is it so important to obtain new and independent tests of Einstein’s gravity on cosmological scales. I shall discuss some of the currently considered and available tests...
- Cosmic velocity fields as probes of the nature of gravity on 31st Mar 2016 5:00:pm Peculiar velocities of galaxies reflect continued action of gravity working throughout the whole cosmic expansion history. This indicates that velocity-based probes and observational statistics are, in principle, very well posed to be sensitive to even very moderate modifications to the standard force-law of General Relativity. Whether it be a theory of modified gravity, or a...
- Cosmic velocity fields as probes of the nature of gravity on 7th Jan 2016 1:00:pm Peculiar velocities of galaxies reflect continued action of gravity working throughout the whole cosmic expansion history. This indicates that velocity-based probes and observational statistics are, in principle, very well posed in principle to be sensitive to even very moderate modifications to the standard laws of GR. Whether it be a theory of modified gravity (MOG)...
- COCOS – the database for the COCO simulation on 17th Dec 2015 3:00:pm I shall describe a new public data base for large very high-resolution simulation “Copernicus Complexio” (COCO) that we are building in Warsaw. The database will include new, state-of-the-art BigData computing solutions, including: fully scalable Impala data base and Apache Spark server system. The new database engine will support SQL-compatibile queries and will provide the public...